L99LD21 datasheet(72/73 Pages) STMICROELECTRONICS

72 / 73 page

Revision history

L99LD21

72/73

DS11130 Rev 5

13-Mar-2018

Datasheet status promoted from preliminary data to production data.

Removed in cover page the image of the TQFP-48 package.

Updated:

– Features and description in cover page;

– Section 1: Introduction on page 8;

– Figure 1: Functional block diagram on page 9;

– Figure 2: Typical application schematic on page 10

– added Figure 3: Application diagram on page 10;

– removed TQFP48 connection diagram;

– removed column “TQFP48” on Table 1: Pin functionality;

– Section 2.5: Feedback failure protection;

– Section 2.7: Soft start;

– Section 3.1: General description on page 18;

– Section 3.3: Peak and average current setting

– Section 4.1.1: Standby mode;

– Section 4.1.2: Pre-standby mode;

– Section 4.2.2: PWM dimming

– Table 13: ROM memory map;

– Section 5.4.1: Control Register description;

– Section 5.4.2: Status Register description;

– Section 5.4.3: Customer test and trimming registers description;

– Section 5.4.4: Customer test and trimming procedure description;

– Section 6: Electrical specifications

– removed “TQFP-48L thermal data” in Section 7: Package and

PCB thermal data;

– removed “TQFP-48L package information” in Section 8: Package

information;

– removed reference to TQFP48 package in Section 9: Order

codes.

10-May-2018

Updated equation in Section 2.3: Output voltage setting. Updated

Table 37.

25-Jul-2018

Updated Figure 9: Device state diagram.

Table 51. Document revision history (continued)

Date

Revision

Changes

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